The weather yesterday was              it is today. [ ]

A. not as wetter as

B. much wetter than

C. more wetter than

D. wetter as

下列有关能源的表述正确的是( )。

A．目前核电站对核能的利用方式分为核聚变和核裂变两种

B．氢气是一种可实现二氧化碳零排放的能源

C．太阳能电池的工作原理是光化学转换

D．可燃冰是一种稀缺的能源资源